Curb forming machine



FIG. 1 is a perspective view of a curb forming machine embodying our new design showing the front and one side thereof;

FIG. 2 is a perspective view showing the rear and the other side thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is a side elevational view thereof showing the side opposite the side shown in FIG. 5; and

FIG. 7 is a top plan view thereof. 

The ornamental design for a curb forming machine, as shown. 